1.8.0 release notes

14th May 2021

🌟 New features

• You can now create a HealthChecker that updates its healthiness periodically. #3392 #3406

  HealthChecker.of(() -> {
      HealthCheckStatus status = ...;
      UnmodifiableFuture.completedFuture(status);
  }, Duration.ofSeconds(5));

• You can now create a propagating ContextAwareExecutorService and ContextAwareScheduledExecutorService using RequestContext.makeContextPropagating(ExecutorService) and RequestContext.makeContextPropagating(ScheduledExecutorService). The executors propagate a RequestContext to submitted tasks when a submission thread is a request-context-aware thread. #3483

  ExecutorService myExecutor = Executors.newSingleThreadExecutor();
  ExecutorService contextAwareExecutor = RequestContext.makeContextPropagating(myExecutor);
  // Make sure the current thread is a request-context-aware thread
  RequestContext ctx = RequestContext.current();
  contextAwareExecutor.execute(() -> {
      assert RequestContext.current() == ctx;
  });

• You can now set a maximum allowed length of a server response in the request level using WebClientRequestPreparation.maxResponseLength(). #3565

  WebClient client = ...;
  client.prepare()
        .maxResponseLength(maxResponseLength)
        ...
        .execute();

• You can now add or set HTTP headers and query params with java.util.Map. #3499 #3502

   HttpHeaders
      .builder()
      .add(Map.of("foo", "1"))
      .set(Map.of("bar", "2"));
  
  QueryParams.builder()
             .add(Map.of("page", "1"))
             .set(Map.of("size", "2"));

• You can now disable DNS query metrics using DnsResolverGroupBuilder.disableDnsQueryMetrics(). #3368 #3552

  ClientFactory.builder()
               .domainNameResolverCustomizer(customizer -> {
                   customizer.disableDnsQueryMetrics();
               })

• You can now create a JSON Lines response using JsonLines. #3446 #3456

  Publisher<MyObject> publisher = StreamMessage.of(new MyObject(...), new MyObject(...), ...);
  HttpReponse response = JsonLines.fromPublisher(publisher);

• You can now create an RpcRequest with a service name using RpcRequest.of(). #3537

• You can now customize MetricCollectingService with MetricCollectingServiceConfigurator when using Spring integration. #3536

  @Bean
  public MetricCollectingServiceConfigurator metricCollectingServiceConfigurator() {
      return builder -> builder
              .successFunction((context, log) -> {
                  final int statusCode = log.responseHeaders().status().code();
                  return (statusCode >= 200 && statusCode < 400) || statusCode == 404;
              });
  }

📈 Improvements

• Various performance optimizations. #3534 #3535 #3537 #3538 #3539 #3543 #3548
• You can now null-safely access the elements of collections and arrays in Kotlin 1.5. #3527 #3558
• You can now use code completion for armeria.ssl when using IntelliJ IDEA. #3507

🛠️ Bug fixes

• Armeria server now correctly sends Connection: close header on an invalid HTTP/1 request. #3506
• You no longer see an infinity loop or an IllegalStateException: Recurse update when invalidating a DNS cache. #3528
• LoggingService now correctly logs a request failed with the server error class(5xx) that is served by TransientService. #3551 #3559
• You no longer see trailing dollar signs from a service name. #3508
• You no longer see a NullPointerException when a request times out. #3564

⛓ Dependencies

• Caffeine 2.9.0 -> 2.9.1
• Dropwizard Metrics 4.1.20 -> 4.1.21
• java-jwt 3.15.0 -> 3.16.0
• Micrometer 1.6.6 -> 1.7.0
  • Note that PrometheusMeterRegistry will work with the Prometheus simpleclient dependency version 0.10.0 or later only. See Micrometer 1.7.0 release note for more information.
• Reactor 3.4.5 -> 3.4.6
• scala-collection-compat 2.4.3 -> 2.4.4
• scala-java8-compat 0.9.1 -> 1.0.0
• Spring 5.3.6 -> 5.3.7

🙇 Thank you